阅读理解 For many of us，summertime means road trips to the beach or mountains，or at the very least some

阅读理解
For many of us，summertime means road trips to the beach or mountains，or at the very least some additional dust and bird poop on the exterior of our vehicles.The extra dirt leads us to do one of two things：wash our car in the driveway or head to the car wash.But which choice is better for the environment?
The main concerns with either choice are the amount of fresh water being used and the types of chemicals used to remove the dirt.Both of these concerns can be closely monitored when washing the car at home，says Katy Gresh，spokeswoman for the Southwest Region of the Pennsylvania Department of Environmental Protection.She advises car owners to put aside a set amount of water for the entire wash.“It’s just like brushing your teeth，”she says.“You don’t want to leave the water running or use more than you need for the job.” But even following this advice comes with an environmental risk：Washing your car in the driveway or street flushes the dirty water into storm drains.
John Schombert is executive director of 3 Rivers Wet Weather.His organization works to educate the public about storm sewers(下水道) and water runoff，keeping this untreated water from entering the Allegheny region’s waterways.“We ask people to consider washing their cars on lawns or other permeable(透水的) surfaces where the water gets absorbed，”Schombert says.“Soil can break down and help filter(过滤) those things，”Schombert says.“Storm sewers are not made for waste disposal.”Even when car owners use natural soaps to wash their cars，which Schombert says are probably ineffective at breaking down grease anyway.
The commercial car wash down the street knows full well the rules regarding wastewater in storm sewers.According to the International Carwash Association(ICA)，professional car washes must use water reclamation systems.These mandated processes not only keep the dirty water out of storm sewers and regular water treatment systems，but they also work to reduce water usage at commercial facilities.
4. What worries people when they have their cars washed?
A. The dirt cannot be removed easily.
B. Large quantities of water are wasted.
C. The washing ways do no good to their cars.
D The used chemicals are harmless to the environment.
5. What’s the disadvantage of washing cars at home?
A. It is not easy to deal with.
B. It cannot clean the dirt completely.
C. It consumes a larger amount of water.
D. It does much damage to the environment.
6. What can be the best title of the text?
A. Do You Put Carwashing at Risk?
B. Which Is Better：Car Wash or DIY?
C. Why Dishwashers Are Better than Hand Washing?
D. Do Americans Use Less Water than They Did Years Ago?
【答案】4. B    5. D    6. B
【解析】